diff --git a/tox.ini b/tox.ini
index c5119ca798..df9ffbc3b7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,7 +26,7 @@ setenv =
 # TODO(stephenfin): Remove psycopg2 when minimum constraints is bumped to 2.8
   PYTHONWARNINGS = ignore::UserWarning:psycopg2
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
 passenv =
@@ -157,7 +157,7 @@ description =
 # Note that we don't use {[testenv]deps} for deps here because we don't want
 # to install (test-)requirements.txt for docs.
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands =
   rm -rf doc/build/html doc/build/doctrees